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MULTI-JUNCTION SOLAR CELL WITH DILUTE NITRIDE SUB-CELL HAVING GRADED DOPING
MULTI-JUNCTION SOLAR CELL WITH DILUTE NITRIDE SUB-CELL HAVING GRADED DOPING
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机译：梯度掺杂的稀硝酸亚细胞多结太阳能电池
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摘要
A lattice-matched solar cell having a dilute nitride-based sub-cell has exponential doping to thereby control current-carrying capacity of the solar cell. Specifically a solar cell with at least one dilute nitride sub-cell that has a variably doped base or emitter is disclosed. In one embodiment, a lattice matched multi-junction solar cell has an upper subcell, a middle sub-cell and a lower dilute nitride sub-cell, the lower dilute nitride sub-cell having doping in the base and/or the emitter that is at least partially exponentially doped so as to improve its solar cell performance characteristics. In construction, the dilute nitride subcell may have the lowest bandgap and be lattice matched to a substrate, the middle cell typically has a higher bandgap than the dilute nitride sub-cell while it is lattice matched to the dilute nitride sub-cell. The upper sub-cell typically has the highest bandgap and is lattice matched to the adjacent sub-cell.
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